2187880654680 has 640 divisors, whose sum is σ = 8906145177600. Its totient is φ = 470271578112.

The previous prime is 2187880654607. The next prime is 2187880654693. The reversal of 2187880654680 is 864560887812.

2187880654680 is a `hidden beast` number, since 2 + 1 + 8 + 7 + 8 + 8 + 0 + 6 + 546 + 80 = 666.

It is a super-4 number, since 4×2187880654680⁴ (a number of 50 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 804662361 + ... + 804665079.

It is an arithmetic number, because the mean of its divisors is an integer number (13915851840).

Almost surely, 2^{2187880654680} is an apocalyptic number.

2187880654680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2187880654680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4453072588800).

2187880654680 is an abundant number, since it is smaller than the sum of its proper divisors (6718264522920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2187880654680 is a wasteful number, since it uses less digits than its factorization.

2187880654680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4853 (or 4840 counting only the distinct ones).

The product of its (nonzero) digits is 41287680, while the sum is 63.

The spelling of 2187880654680 in words is "two trillion, one hundred eighty-seven billion, eight hundred eighty million, six hundred fifty-four thousand, six hundred eighty".